:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #11AEEA;
    --primary-dark: #1688D8;
    --ink-blue: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    --shadow: 0 18px 48px rgba(21, 90, 157, 0.12);
    --shadow-soft: 0 12px 30px rgba(21, 90, 157, 0.08);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --header-height: 78px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.drawer-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }

.skip-link {
    position: fixed;
    left: 12px;
    top: -60px;
    z-index: 9999;
    background: var(--footer);
    color: #fff;
    padding: 10px 16px;
    border-radius: 10px;
}
.skip-link:focus { top: 10px; }

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255,255,255,.94);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(21, 90, 157, 0.06);
}
.header-shell {
    width: min(calc(100% - 32px), 1360px);
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(14px, 2vw, 28px);
}
.brand-logo { flex: 0 0 auto; display: flex; align-items: center; }
.brand-logo img { width: clamp(112px, 10vw, 148px); height: 46px; object-fit: contain; }
.desktop-nav {
    min-width: 0;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(5px, .82vw, 14px);
    overflow: hidden;
}
.desktop-nav a {
    flex: 0 0 auto;
    white-space: nowrap;
    font-size: clamp(13px, .95vw, 15px);
    color: var(--muted);
    padding: 8px clamp(4px, .55vw, 10px);
    border-radius: 999px;
    transition: .22s ease;
}
.desktop-nav a:hover,
.desktop-nav a.active { color: var(--primary-dark); background: var(--surface-soft); }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 92px;
    min-height: 42px;
    padding: 10px 22px;
    border-radius: 999px;
    color: #fff;
    background: var(--gradient);
    box-shadow: 0 10px 24px rgba(22, 136, 216, .24);
    font-weight: 700;
    white-space: nowrap;
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(22,136,216,.3); }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 13px;
    background: #fff;
    padding: 10px;
}
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--ink-blue); border-radius: 99px; }

.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 1090;
    background: rgba(7, 58, 104, .34);
    opacity: 0;
    visibility: hidden;
    transition: .24s ease;
}
.mobile-drawer {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 1100;
    width: min(88vw, 390px);
    padding: 20px;
    background: #fff;
    transform: translateX(100%);
    transition: transform .26s ease;
    overflow-y: auto;
    box-shadow: -24px 0 50px rgba(7,58,104,.18);
}
.drawer-open .drawer-overlay { opacity: 1; visibility: visible; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.drawer-logo img { width: 128px; height: 42px; object-fit: contain; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 50%; background: var(--surface-soft); color: var(--ink-blue); font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; gap: 6px; padding: 18px 0; }
.drawer-nav a { display: flex; justify-content: space-between; align-items: center; padding: 13px 14px; border-radius: 12px; color: var(--text); }
.drawer-nav a:hover, .drawer-nav a.active { background: var(--surface-soft); color: var(--primary-dark); }
.drawer-register { width: 100%; }

main { padding-top: var(--header-height); }
.container { width: min(calc(100% - 32px), 1200px); margin: 0 auto; }
.section { padding: clamp(58px, 8vw, 96px) 0; }
.section-soft { background: var(--surface-soft); }
.section-white { background: var(--surface); }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-dark);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.eyebrow::before { content: ""; width: 28px; height: 3px; border-radius: 99px; background: var(--gradient); }
h1, h2, h3 { color: var(--ink-blue); line-height: 1.3; margin-top: 0; }
h1 { font-size: clamp(32px, 5.2vw, 58px); margin-bottom: 18px; letter-spacing: -.03em; }
h2 { font-size: clamp(26px, 3.4vw, 40px); margin-bottom: 14px; }
h3 { font-size: 20px; margin-bottom: 10px; }
p { margin: 0 0 16px; }
.lead { color: var(--muted); font-size: clamp(16px, 1.7vw, 20px); }
.text-link { color: var(--primary-dark); font-weight: 700; display: inline-flex; align-items: center; gap: 6px; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }

.carousel-section { padding: 26px 0 0; }
.carousel {
    position: relative;
    overflow: hidden;
    border-radius: clamp(18px, 3vw, 32px);
    background: #dff4ff;
    box-shadow: var(--shadow);
}
.carousel-track { display: flex; transition: transform .55s ease; }
.carousel-slide { flex: 0 0 100%; min-width: 0; }
.carousel-slide img { width: 100%; height: clamp(230px, 45vw, 560px); object-fit: contain; background: #eaf8ff; }
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: clamp(40px, 5vw, 52px);
    height: clamp(40px, 5vw, 52px);
    border: 1px solid rgba(255,255,255,.7);
    border-radius: 50%;
    background: rgba(7,58,104,.56);
    color: #fff;
    font-size: 28px;
    display: grid;
    place-items: center;
}
.carousel-arrow:hover { background: rgba(7,58,104,.76); }
.carousel-prev { left: clamp(10px, 2vw, 24px); }
.carousel-next { right: clamp(10px, 2vw, 24px); }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%); display: flex; gap: 8px; z-index: 3; }
.carousel-dot { width: 9px; height: 9px; border: 0; border-radius: 999px; background: rgba(255,255,255,.7); padding: 0; transition: .2s ease; }
.carousel-dot.active { width: 28px; background: #fff; }

.intro-grid, .split-grid, .hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr); gap: clamp(28px, 5vw, 68px); align-items: center; }
.hero-section { padding: clamp(62px, 9vw, 112px) 0; background: radial-gradient(circle at 85% 18%, rgba(53,215,255,.2), transparent 30%), linear-gradient(180deg, #f8fdff, #eef9ff); }
.hero-copy .button-row { margin-top: 28px; }
.hero-media, .content-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.hero-media img, .content-image img { width: 100%; max-height: 470px; object-fit: contain; background: #edf9ff; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; }
.secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 10px 22px; border-radius: 999px; color: var(--primary-dark); background: #fff; border: 1px solid var(--border); font-weight: 700; }
.secondary-btn:hover { background: var(--surface-soft); }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.info-card, .quick-card, .review-card, .faq-item, .notice-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
}
.info-card, .quick-card, .review-card, .notice-card { padding: clamp(20px, 3vw, 28px); }
.info-card p, .quick-card p, .review-card p { color: var(--muted); }
.quick-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; }
.quick-card { min-height: 212px; display: flex; flex-direction: column; }
.quick-card .text-link { margin-top: auto; }
.number-badge { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; margin-bottom: 16px; color: #fff; font-weight: 800; background: var(--gradient); }

.media-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.media-card { overflow: hidden; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); box-shadow: var(--shadow-soft); }
.media-card img { width: 100%; height: 280px; object-fit: contain; background: #eef9ff; }
.media-card-copy { padding: 24px; }

.list-check { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.list-check li { position: relative; padding-left: 30px; }
.list-check li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 20px; height: 20px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--gradient); font-size: 12px; font-weight: 900; }
.step-list { counter-reset: step; display: grid; gap: 16px; }
.step-item { counter-increment: step; display: grid; grid-template-columns: 52px minmax(0,1fr); gap: 16px; align-items: start; padding: 22px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); }
.step-item::before { content: counter(step, decimal-leading-zero); width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; background: var(--surface-soft); color: var(--primary-dark); font-weight: 900; }
.step-item h3 { margin-bottom: 6px; }
.step-item p { margin: 0; color: var(--muted); }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.review-card blockquote { margin: 0 0 18px; color: var(--text); }
.review-card footer { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 14px; }
.review-card .tag { padding: 4px 10px; border-radius: 999px; background: var(--surface-soft); color: var(--primary-dark); }

.notice-card { background: linear-gradient(135deg, #ffffff, #eaf8ff); }
.notice-card strong { color: var(--ink-blue); }
.legal-strip { padding: 26px; border-radius: var(--radius-md); background: var(--footer); color: var(--footer-text); }
.legal-strip h2, .legal-strip h3 { color: #fff; }
.legal-strip p:last-child { margin-bottom: 0; }

.faq-list { display: grid; gap: 14px; }
.faq-item { overflow: hidden; }
.faq-item details { padding: 0 24px; }
.faq-item summary { cursor: pointer; list-style: none; padding: 22px 36px 22px 0; font-weight: 800; color: var(--ink-blue); position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 0; top: 17px; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--surface-soft); color: var(--primary-dark); }
.faq-item details[open] summary::after { content: "−"; }
.faq-answer { padding: 0 0 22px; color: var(--muted); }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.info-table { width: 100%; border-collapse: collapse; min-width: 680px; }
.info-table th, .info-table td { padding: 16px 18px; border-bottom: 1px solid var(--border); text-align: left; }
.info-table th { color: var(--ink-blue); background: var(--surface-soft); }
.info-table tr:last-child td { border-bottom: 0; }

.site-footer { background: var(--footer); color: var(--footer-text); padding: 58px 0 0; }
.footer-shell { width: min(calc(100% - 32px), 1200px); margin: 0 auto; display: grid; grid-template-columns: 1.2fr 1.8fr; gap: 64px; }
.footer-brand img { width: 146px; height: 52px; object-fit: contain; filter: brightness(0) invert(1); margin-bottom: 18px; }
.footer-brand p { color: rgba(234,248,255,.78); max-width: 510px; }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 24px; }
.footer-links h2 { color: #fff; font-size: 17px; margin-bottom: 15px; }
.footer-links a { display: block; color: rgba(234,248,255,.78); margin: 8px 0; }
.footer-links a:hover { color: #fff; }
.footer-bottom { margin-top: 46px; padding: 22px 16px; border-top: 1px solid rgba(255,255,255,.12); text-align: center; color: rgba(234,248,255,.7); font-size: 13px; }
.footer-bottom p { margin: 4px auto; max-width: 1000px; }

@media (max-width: 1180px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .header-shell { justify-content: space-between; }
    .quick-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
    .card-grid.four { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 900px) {
    :root { --header-height: 70px; }
    .intro-grid, .split-grid, .hero-grid { grid-template-columns: 1fr; }
    .hero-media { order: -1; }
    .card-grid, .review-grid { grid-template-columns: 1fr 1fr; }
    .footer-shell { grid-template-columns: 1fr; gap: 34px; }
}
@media (max-width: 680px) {
    .header-shell, .container, .footer-shell { width: min(calc(100% - 24px), 1200px); }
    .brand-logo img { width: 108px; }
    .header-actions .main-btn { min-width: 76px; min-height: 40px; padding: 9px 16px; }
    .section { padding: 52px 0; }
    .carousel-section { padding-top: 16px; }
    .carousel-slide img { height: 230px; }
    .quick-grid, .card-grid, .card-grid.two, .card-grid.four, .review-grid, .media-cards { grid-template-columns: 1fr; }
    .quick-card { min-height: auto; }
    .footer-links { grid-template-columns: 1fr 1fr; }
    .step-item { grid-template-columns: 44px minmax(0,1fr); padding: 18px; }
    .step-item::before { width: 42px; height: 42px; }
}
@media (max-width: 420px) {
    .header-actions { gap: 7px; }
    .header-actions .main-btn { padding-inline: 14px; min-width: 70px; }
    .menu-toggle { width: 42px; height: 42px; }
    .footer-links { grid-template-columns: 1fr; }
    h1 { font-size: 32px; }
}